tests/test-intprops.c

   1 /* Test intprops.h.
   2    Copyright (C) 2011-2017 Free Software Foundation, Inc.
   3
   4    This program is free software: you can redistribute it and/or modify
   5    it under the terms of the GNU General Public License as published by
   6    the Free Software Foundation; either version 3 of the License, or
   7    (at your option) any later version.
   8
   9    This program is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12    GNU General Public License for more details.
  13
  14    You should have received a copy of the GNU General Public License
  15    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  16
  17 /* Written by Paul Eggert.  */
  18
  19 /* Tell gcc not to warn about the long expressions that the overflow
  20    macros expand to, or about the (X < 0) expressions.  */
  21 #if 4 < __GNUC__ + (3 <= __GNUC_MINOR__)
  22 # pragma GCC diagnostic ignored "-Woverlength-strings"
  23 # pragma GCC diagnostic ignored "-Wtype-limits"
  24
  25 /* Work around a bug in GCC 6.1 and earlier; see:
  26    https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68971  */
  27 # pragma GCC diagnostic ignored "-Woverflow"
  28
  29 #endif
  30
  31 #include <config.h>
  32
  33 #include "intprops.h"
  34 #include "verify.h"
  35
  36 #include <stdbool.h>
  37 #include <inttypes.h>
  38 #include <limits.h>
  39
  40 #include "macros.h"
  41
  42 /* VERIFY (X) uses a static assertion for compilers that are known to work,
  43    and falls back on a dynamic assertion for other compilers.
  44    These tests should be checkable via 'verify' rather than 'ASSERT', but
  45    using 'verify' would run into a bug with HP-UX 11.23 cc; see
  46    <http://lists.gnu.org/archive/html/bug-gnulib/2011-05/msg00401.html>.  */
  47 #if __GNUC__ || __SUNPRO_C
  48 # define VERIFY(x) do { verify (x); } while (0)
  49 #else
  50 # define VERIFY(x) ASSERT (x)
  51 #endif
  52
  53 #define DONTCARE __LINE__
  54
  55 int
  56 main (void)
  57 {
  58   /* Use VERIFY for tests that must be integer constant expressions,
  59      ASSERT otherwise.  */
  60
  61   /* TYPE_IS_INTEGER.  */
  62   ASSERT (TYPE_IS_INTEGER (bool));
  63   ASSERT (TYPE_IS_INTEGER (char));
  64   ASSERT (TYPE_IS_INTEGER (signed char));
  65   ASSERT (TYPE_IS_INTEGER (unsigned char));
  66   ASSERT (TYPE_IS_INTEGER (short int));
  67   ASSERT (TYPE_IS_INTEGER (unsigned short int));
  68   ASSERT (TYPE_IS_INTEGER (int));
  69   ASSERT (TYPE_IS_INTEGER (unsigned int));
  70   ASSERT (TYPE_IS_INTEGER (long int));
  71   ASSERT (TYPE_IS_INTEGER (unsigned long int));
  72   ASSERT (TYPE_IS_INTEGER (intmax_t));
  73   ASSERT (TYPE_IS_INTEGER (uintmax_t));
  74   ASSERT (! TYPE_IS_INTEGER (float));
  75   ASSERT (! TYPE_IS_INTEGER (double));
  76   ASSERT (! TYPE_IS_INTEGER (long double));
  77
  78   /* TYPE_SIGNED.  */
  79   /* VERIFY (! TYPE_SIGNED (bool)); // not guaranteed by gnulib substitute */
  80   VERIFY (TYPE_SIGNED (signed char));
  81   VERIFY (! TYPE_SIGNED (unsigned char));
  82   VERIFY (TYPE_SIGNED (short int));
  83   VERIFY (! TYPE_SIGNED (unsigned short int));
  84   VERIFY (TYPE_SIGNED (int));
  85   VERIFY (! TYPE_SIGNED (unsigned int));
  86   VERIFY (TYPE_SIGNED (long int));
  87   VERIFY (! TYPE_SIGNED (unsigned long int));
  88   VERIFY (TYPE_SIGNED (intmax_t));
  89   VERIFY (! TYPE_SIGNED (uintmax_t));
  90   ASSERT (TYPE_SIGNED (float));
  91   ASSERT (TYPE_SIGNED (double));
  92   ASSERT (TYPE_SIGNED (long double));
  93
  94   /* Integer representation.  Check that it is two's complement.  */
  95   VERIFY (INT_MIN + INT_MAX < 0);
  96
  97   /* TYPE_MINIMUM, TYPE_MAXIMUM.  */
  98   VERIFY (TYPE_MINIMUM (char) == CHAR_MIN);
  99   VERIFY (TYPE_MAXIMUM (char) == CHAR_MAX);
 100   VERIFY (TYPE_MINIMUM (unsigned char) == 0);
 101   VERIFY (TYPE_MAXIMUM (unsigned char) == UCHAR_MAX);
 102   VERIFY (TYPE_MINIMUM (signed char) == SCHAR_MIN);
 103   VERIFY (TYPE_MAXIMUM (signed char) == SCHAR_MAX);
 104   VERIFY (TYPE_MINIMUM (short int) == SHRT_MIN);
 105   VERIFY (TYPE_MAXIMUM (short int) == SHRT_MAX);
 106   VERIFY (TYPE_MINIMUM (unsigned short int) == 0);
 107   VERIFY (TYPE_MAXIMUM (unsigned short int) == USHRT_MAX);
 108   VERIFY (TYPE_MINIMUM (int) == INT_MIN);
 109   VERIFY (TYPE_MAXIMUM (int) == INT_MAX);
 110   VERIFY (TYPE_MINIMUM (unsigned int) == 0);
 111   VERIFY (TYPE_MAXIMUM (unsigned int) == UINT_MAX);
 112   VERIFY (TYPE_MINIMUM (long int) == LONG_MIN);
 113   VERIFY (TYPE_MAXIMUM (long int) == LONG_MAX);
 114   VERIFY (TYPE_MINIMUM (unsigned long int) == 0);
 115   VERIFY (TYPE_MAXIMUM (unsigned long int) == ULONG_MAX);
 116   VERIFY (TYPE_MINIMUM (intmax_t) == INTMAX_MIN);
 117   VERIFY (TYPE_MAXIMUM (intmax_t) == INTMAX_MAX);
 118   VERIFY (TYPE_MINIMUM (uintmax_t) == 0);
 119   VERIFY (TYPE_MAXIMUM (uintmax_t) == UINTMAX_MAX);
 120
 121   /* INT_BITS_STRLEN_BOUND.  */
 122   VERIFY (INT_BITS_STRLEN_BOUND (1) == 1);
 123   VERIFY (INT_BITS_STRLEN_BOUND (2620) == 789);
 124
 125   /* INT_STRLEN_BOUND, INT_BUFSIZE_BOUND.  */
 126   #ifdef INT32_MAX /* POSIX guarantees int32_t; this ports to non-POSIX.  */
 127   VERIFY (INT_STRLEN_BOUND (int32_t) == sizeof ("-2147483648") - 1);
 128   VERIFY (INT_BUFSIZE_BOUND (int32_t) == sizeof ("-2147483648"));
 129   #endif
 130   #ifdef INT64_MAX
 131   VERIFY (INT_STRLEN_BOUND (int64_t) == sizeof ("-9223372036854775808") - 1);
 132   VERIFY (INT_BUFSIZE_BOUND (int64_t) == sizeof ("-9223372036854775808"));
 133   #endif
 134
 135   /* All the INT_<op>_RANGE_OVERFLOW tests are equally valid as
 136      INT_<op>_OVERFLOW tests, so define macros to do both.  OP is the
 137      operation, OPNAME its symbolic name, A and B its operands, T the
 138      result type, V the overflow flag, and VRES the result if V and if
 139      two's complement.  CHECK_BINOP is for most binary operatinos,
 140      CHECK_SBINOP for binary +, -, * when the result type is signed,
 141      and CHECK_UNOP for unary operations.  */
 142   #define CHECK_BINOP(op, opname, a, b, t, v, vres)                       \
 143     VERIFY (INT_##opname##_RANGE_OVERFLOW (a, b, TYPE_MINIMUM (t),        \
 144                                            TYPE_MAXIMUM (t))              \
 145             == (v));                                                      \
 146     VERIFY (INT_##opname##_OVERFLOW (a, b) == (v))
 147   #define CHECK_SBINOP(op, opname, a, b, t, v, vres)                      \
 148     CHECK_BINOP(op, opname, a, b, t, v, vres);                            \
 149     {                                                                     \
 150       t result;                                                           \
 151       ASSERT (INT_##opname##_WRAPV (a, b, &result) == (v));               \
 152       ASSERT (result == ((v) ? (vres) : ((a) op (b))));                   \
 153     }
 154   #define CHECK_UNOP(op, opname, a, t, v)                                 \
 155     VERIFY (INT_##opname##_RANGE_OVERFLOW (a, TYPE_MINIMUM (t),           \
 156                                            TYPE_MAXIMUM (t))              \
 157             == (v));                                                      \
 158     VERIFY (INT_##opname##_OVERFLOW (a) == (v))
 159
 160   /* INT_<op>_RANGE_OVERFLOW, INT_<op>_OVERFLOW.  */
 161   VERIFY (INT_ADD_RANGE_OVERFLOW (INT_MAX, 1, INT_MIN, INT_MAX));
 162   VERIFY (INT_ADD_OVERFLOW (INT_MAX, 1));
 163
 164   CHECK_SBINOP (+, ADD, INT_MAX, 1, int, true, INT_MIN);
 165   CHECK_SBINOP (+, ADD, INT_MAX, -1, int, false, INT_MAX - 1);
 166   CHECK_SBINOP (+, ADD, INT_MIN, 1, int, false, INT_MIN + 1);
 167   CHECK_SBINOP (+, ADD, INT_MIN, -1, int, true, INT_MAX);
 168   CHECK_BINOP (+, ADD, UINT_MAX, 1u, unsigned int, true, 0u);
 169   CHECK_BINOP (+, ADD, 0u, 1u, unsigned int, false, 1u);
 170
 171   CHECK_SBINOP (-, SUBTRACT, INT_MAX, 1, int, false, INT_MAX - 1);
 172   CHECK_SBINOP (-, SUBTRACT, INT_MAX, -1, int, true, INT_MIN);
 173   CHECK_SBINOP (-, SUBTRACT, INT_MIN, 1, int, true, INT_MAX);
 174   CHECK_SBINOP (-, SUBTRACT, INT_MIN, -1, int, false, INT_MIN - -1);
 175   CHECK_BINOP (-, SUBTRACT, UINT_MAX, 1u, unsigned int, false, UINT_MAX - 1u);
 176   CHECK_BINOP (-, SUBTRACT, 0u, 1u, unsigned int, true, 0u - 1u);
 177
 178   CHECK_UNOP (-, NEGATE, INT_MIN, int, true);
 179   CHECK_UNOP (-, NEGATE, 0, int, false);
 180   CHECK_UNOP (-, NEGATE, INT_MAX, int, false);
 181   CHECK_UNOP (-, NEGATE, 0u, unsigned int, false);
 182   CHECK_UNOP (-, NEGATE, 1u, unsigned int, true);
 183   CHECK_UNOP (-, NEGATE, UINT_MAX, unsigned int, true);
 184
 185   CHECK_SBINOP (*, MULTIPLY, INT_MAX, INT_MAX, int, true, 1);
 186   CHECK_SBINOP (*, MULTIPLY, INT_MAX, INT_MIN, int, true, INT_MIN);
 187   CHECK_SBINOP (*, MULTIPLY, INT_MIN, INT_MAX, int, true, INT_MIN);
 188   CHECK_SBINOP (*, MULTIPLY, INT_MIN, INT_MIN, int, true, 0);
 189   CHECK_SBINOP (*, MULTIPLY, -1, INT_MIN, int,
 190                 INT_NEGATE_OVERFLOW (INT_MIN), INT_MIN);
 191   CHECK_SBINOP (*, MULTIPLY, LONG_MIN / INT_MAX, (long int) INT_MAX,
 192                 long int, false, LONG_MIN - LONG_MIN % INT_MAX);
 193
 194   CHECK_BINOP (/, DIVIDE, INT_MIN, -1, int,
 195                INT_NEGATE_OVERFLOW (INT_MIN), INT_MIN);
 196   CHECK_BINOP (/, DIVIDE, INT_MAX, 1, int, false, INT_MAX);
 197   CHECK_BINOP (/, DIVIDE, (unsigned int) INT_MIN, -1u, unsigned int,
 198                false, INT_MIN / -1u);
 199
 200   CHECK_BINOP (%, REMAINDER, INT_MIN, -1, int, INT_NEGATE_OVERFLOW (INT_MIN), 0);
 201   CHECK_BINOP (%, REMAINDER, INT_MAX, 1, int, false, 0);
 202   CHECK_BINOP (%, REMAINDER, (unsigned int) INT_MIN, -1u, unsigned int,
 203                false, INT_MIN % -1u);
 204
 205   CHECK_BINOP (<<, LEFT_SHIFT, UINT_MAX, 1, unsigned int, true, UINT_MAX << 1);
 206   CHECK_BINOP (<<, LEFT_SHIFT, UINT_MAX / 2 + 1, 1, unsigned int, true,
 207                (UINT_MAX / 2 + 1) << 1);
 208   CHECK_BINOP (<<, LEFT_SHIFT, UINT_MAX / 2, 1, unsigned int, false,
 209                (UINT_MAX / 2) << 1);
 210
 211   /* INT_<op>_OVERFLOW and INT_<op>_WRAPV with mixed types.  */
 212   #define CHECK_SUM(a, b, t, v, vres)                                     \
 213     CHECK_SUM1(a, b, t, v, vres);                                         \
 214     CHECK_SUM1(b, a, t, v, vres)
 215   #define CHECK_SSUM(a, b, t, v, vres)                                    \
 216     CHECK_SSUM1(a, b, t, v, vres);                                        \
 217     CHECK_SSUM1(b, a, t, v, vres)
 218   #define CHECK_SUM1(a, b, t, v, vres)                                    \
 219     VERIFY (INT_ADD_OVERFLOW (a, b) == (v))
 220   #define CHECK_SSUM1(a, b, t, v, vres)                                   \
 221     CHECK_SUM1(a, b, t, v, vres);                                         \
 222     {                                                                     \
 223       t result;                                                           \
 224       ASSERT (INT_ADD_WRAPV (a, b, &result) == (v));                      \
 225       ASSERT (result == ((v) ? (vres) : ((a) + (b))));                    \
 226     }
 227   CHECK_SSUM (-1, LONG_MIN, long int, true, LONG_MAX);
 228   CHECK_SUM (-1, UINT_MAX, unsigned int, false, DONTCARE);
 229   CHECK_SSUM (-1L, INT_MIN, long int, INT_MIN == LONG_MIN,
 230               INT_MIN == LONG_MIN ? INT_MAX : DONTCARE);
 231   CHECK_SUM (0u, -1, unsigned int, true, 0u + -1);
 232   CHECK_SUM (0u, 0, unsigned int, false, DONTCARE);
 233   CHECK_SUM (0u, 1, unsigned int, false, DONTCARE);
 234   CHECK_SSUM (1, LONG_MAX, long int, true, LONG_MIN);
 235   CHECK_SUM (1, UINT_MAX, unsigned int, true, 0u);
 236   CHECK_SSUM (1L, INT_MAX, long int, INT_MAX == LONG_MAX,
 237               INT_MAX == LONG_MAX ? INT_MIN : DONTCARE);
 238   CHECK_SUM (1u, INT_MAX, unsigned int, INT_MAX == UINT_MAX, 1u + INT_MAX);
 239   CHECK_SUM (1u, INT_MIN, unsigned int, true, 1u + INT_MIN);
 240   {
 241     long int result;
 242     ASSERT (INT_ADD_WRAPV (1, INT_MAX, &result) == (INT_MAX == LONG_MAX));
 243     ASSERT (INT_ADD_WRAPV (-1, INT_MIN, &result) == (INT_MIN == LONG_MIN));
 244   }
 245
 246   #define CHECK_DIFFERENCE(a, b, t, v, vres)                              \
 247     VERIFY (INT_SUBTRACT_OVERFLOW (a, b) == (v))
 248   #define CHECK_SDIFFERENCE(a, b, t, v, vres)                             \
 249     CHECK_DIFFERENCE(a, b, t, v, vres);                                   \
 250     {                                                                     \
 251       t result;                                                           \
 252       ASSERT (INT_SUBTRACT_WRAPV (a, b, &result) == (v));                 \
 253       ASSERT (result == ((v) ? (vres) : ((a) - (b))));                    \
 254     }
 255   CHECK_DIFFERENCE (INT_MAX, 1u, unsigned int, UINT_MAX < INT_MAX - 1,
 256                     INT_MAX - 1u);
 257   CHECK_DIFFERENCE (UINT_MAX, 1, unsigned int, false, UINT_MAX - 1);
 258   CHECK_DIFFERENCE (0u, -1, unsigned int, false, 0u - -1);
 259   CHECK_DIFFERENCE (UINT_MAX, -1, unsigned int, true, UINT_MAX - -1);
 260   CHECK_DIFFERENCE (INT_MIN, 1u, unsigned int, true, INT_MIN - 1u);
 261   CHECK_DIFFERENCE (-1, 0u, unsigned int, true, -1 - 0u);
 262   CHECK_SDIFFERENCE (-1, INT_MIN, int, false, -1 - INT_MIN);
 263   CHECK_SDIFFERENCE (-1, INT_MAX, int, false, -1 - INT_MAX);
 264   CHECK_SDIFFERENCE (0, INT_MIN, int, INT_MIN < -INT_MAX, INT_MIN);
 265   CHECK_SDIFFERENCE (0, INT_MAX, int, false, 0 - INT_MAX);
 266   {
 267     long int result;
 268     ASSERT (INT_SUBTRACT_WRAPV (INT_MAX, -1, &result) == (INT_MAX == LONG_MAX));
 269     ASSERT (INT_SUBTRACT_WRAPV (INT_MIN, 1, &result) == (INT_MAX == LONG_MAX));
 270   }
 271
 272   #define CHECK_PRODUCT(a, b, t, v, vres)                                 \
 273     CHECK_PRODUCT1(a, b, t, v, vres);                                     \
 274     CHECK_PRODUCT1(b, a, t, v, vres)
 275   #define CHECK_SPRODUCT(a, b, t, v, vres)                                \
 276     CHECK_SPRODUCT1(a, b, t, v, vres);                                    \
 277     CHECK_SPRODUCT1(b, a, t, v, vres)
 278   #define CHECK_PRODUCT1(a, b, t, v, vres)                                \
 279     VERIFY (INT_MULTIPLY_OVERFLOW (a, b) == (v))
 280   #define CHECK_SPRODUCT1(a, b, t, v, vres)                               \
 281     CHECK_PRODUCT1(a, b, t, v, vres);                                     \
 282     {                                                                     \
 283       t result;                                                           \
 284       ASSERT (INT_MULTIPLY_WRAPV (a, b, &result) == (v));                 \
 285       ASSERT (result == ((v) ? (vres) : ((a) * (b))));                    \
 286     }
 287   CHECK_PRODUCT (-1, 1u, unsigned int, true, -1 * 1u);
 288   CHECK_SPRODUCT (-1, INT_MIN, int, INT_NEGATE_OVERFLOW (INT_MIN), INT_MIN);
 289   CHECK_PRODUCT (-1, UINT_MAX, unsigned int, true, -1 * UINT_MAX);
 290   CHECK_SPRODUCT (-32768, LONG_MAX / -32768 - 1, long int, true, LONG_MIN);
 291   CHECK_SPRODUCT (-12345, LONG_MAX / -12345, long int, false, DONTCARE);
 292   CHECK_SPRODUCT (0, -1, int, false, DONTCARE);
 293   CHECK_SPRODUCT (0, 0, int, false, DONTCARE);
 294   CHECK_PRODUCT (0, 0u, unsigned int, false, DONTCARE);
 295   CHECK_SPRODUCT (0, 1, int, false, DONTCARE);
 296   CHECK_SPRODUCT (0, INT_MAX, int, false, DONTCARE);
 297   CHECK_SPRODUCT (0, INT_MIN, int, false, DONTCARE);
 298   CHECK_PRODUCT (0, UINT_MAX, unsigned int, false, DONTCARE);
 299   CHECK_PRODUCT (0u, -1, unsigned int, false, DONTCARE);
 300   CHECK_PRODUCT (0u, 0, unsigned int, false, DONTCARE);
 301   CHECK_PRODUCT (0u, 0u, unsigned int, false, DONTCARE);
 302   CHECK_PRODUCT (0u, 1, unsigned int, false, DONTCARE);
 303   CHECK_PRODUCT (0u, INT_MAX, unsigned int, false, DONTCARE);
 304   CHECK_PRODUCT (0u, INT_MIN, unsigned int, false, DONTCARE);
 305   CHECK_PRODUCT (0u, UINT_MAX, unsigned int, false, DONTCARE);
 306   CHECK_SPRODUCT (1, INT_MAX, int, false, DONTCARE);
 307   CHECK_SPRODUCT (1, INT_MIN, int, false, DONTCARE);
 308   CHECK_PRODUCT (1, UINT_MAX, unsigned int, false, DONTCARE);
 309   CHECK_PRODUCT (1u, INT_MIN, unsigned int, true, 1u * INT_MIN);
 310   CHECK_PRODUCT (1u, INT_MAX, unsigned int, UINT_MAX < INT_MAX, 1u * INT_MAX);
 311   CHECK_PRODUCT (INT_MAX, UINT_MAX, unsigned int, true, INT_MAX * UINT_MAX);
 312   CHECK_PRODUCT (INT_MAX, ULONG_MAX, unsigned long int, true,
 313                  INT_MAX * ULONG_MAX);
 314   CHECK_SPRODUCT (INT_MIN, LONG_MAX / INT_MIN - 1, long int, true, LONG_MIN);
 315   CHECK_SPRODUCT (INT_MIN, LONG_MAX / INT_MIN, long int, false, DONTCARE);
 316   CHECK_PRODUCT (INT_MIN, UINT_MAX, unsigned int, true, INT_MIN * UINT_MAX);
 317   CHECK_PRODUCT (INT_MIN, ULONG_MAX, unsigned long int, true,
 318                  INT_MIN * ULONG_MAX);
 319   {
 320     long int result;
 321     ASSERT (INT_MULTIPLY_WRAPV (INT_MAX, INT_MAX, &result)
 322             == (LONG_MAX / INT_MAX < INT_MAX));
 323     ASSERT (INT_MULTIPLY_WRAPV (INT_MAX, INT_MAX, &result)
 324             || result == INT_MAX * (long int) INT_MAX);
 325     ASSERT (INT_MULTIPLY_WRAPV (INT_MIN, INT_MIN, &result)
 326             || result == INT_MIN * (long int) INT_MIN);
 327   }
 328
 329 # ifdef LLONG_MAX
 330   {
 331     long long int result;
 332     ASSERT (INT_MULTIPLY_WRAPV (LONG_MAX, LONG_MAX, &result)
 333             == (LLONG_MAX / LONG_MAX < LONG_MAX));
 334     ASSERT (INT_MULTIPLY_WRAPV (LONG_MAX, LONG_MAX, &result)
 335             || result == LONG_MAX * (long long int) LONG_MAX);
 336     ASSERT (INT_MULTIPLY_WRAPV (LONG_MIN, LONG_MIN, &result)
 337             || result == LONG_MIN * (long long int) LONG_MIN);
 338   }
 339 # endif
 340
 341   #define CHECK_QUOTIENT(a, b, v) VERIFY (INT_DIVIDE_OVERFLOW (a, b) == (v))
 342
 343   CHECK_QUOTIENT (INT_MIN, -1L, INT_MIN == LONG_MIN);
 344   CHECK_QUOTIENT (INT_MIN, UINT_MAX, false);
 345   CHECK_QUOTIENT (INTMAX_MIN, UINTMAX_MAX, false);
 346   CHECK_QUOTIENT (INTMAX_MIN, UINT_MAX, false);
 347   CHECK_QUOTIENT (-11, 10u, true);
 348   CHECK_QUOTIENT (-10, 10u, true);
 349   CHECK_QUOTIENT (-9, 10u, false);
 350   CHECK_QUOTIENT (11u, -10, true);
 351   CHECK_QUOTIENT (10u, -10, true);
 352   CHECK_QUOTIENT (9u, -10, false);
 353
 354   #define CHECK_REMAINDER(a, b, v) VERIFY (INT_REMAINDER_OVERFLOW (a, b) == (v))
 355
 356   CHECK_REMAINDER (INT_MIN, -1L, INT_MIN == LONG_MIN);
 357   CHECK_REMAINDER (-1, UINT_MAX, true);
 358   CHECK_REMAINDER ((intmax_t) -1, UINTMAX_MAX, true);
 359   CHECK_REMAINDER (INTMAX_MIN, UINT_MAX,
 360                    (INTMAX_MAX < UINT_MAX
 361                     && - (unsigned int) INTMAX_MIN % UINT_MAX != 0));
 362   CHECK_REMAINDER (INT_MIN, ULONG_MAX, INT_MIN % ULONG_MAX != 1);
 363   CHECK_REMAINDER (1u, -1, false);
 364   CHECK_REMAINDER (37*39u, -39, false);
 365   CHECK_REMAINDER (37*39u + 1, -39, true);
 366   CHECK_REMAINDER (37*39u - 1, -39, true);
 367   CHECK_REMAINDER (LONG_MAX, -INT_MAX, false);
 368
 369   return 0;
 370 }